The plot: Best friends Wren (Joey King), Hallie (Julia Goldani Telles), Chloe (Jaz Sinclair) and Katie (Annalise Basso), while searching the Internet, find a mysterious video that features images of a figure described in forums as 'The Slender Man'. A week after watching the video, Katie disappears and the other three realise that they did more than just watch a video: They actually summoned the Slender Man. As they try and find a way to get her back, the increasingly violent visions they keep seeing indicate that the Slender Man is much closer than they thought... and if they aren't careful, they could be his next victims.
